func ExampleTx_CopyFile() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Create a bucket and a key.
db.Update(func(tx *bolt.Tx) error {
tx.CreateBucket([]byte("widgets"))
tx.Bucket([]byte("widgets")).Put([]byte("foo"), []byte("bar"))
return nil
})
// Copy the database to another file.
toFile := tempfile()
db.View(func(tx *bolt.Tx) error { return tx.CopyFile(toFile, 0666) })
defer os.Remove(toFile)
// Open the cloned database.
db2, _ := bolt.Open(toFile, 0666, nil)
defer db2.Close()
// Ensure that the key exists in the copy.
db2.View(func(tx *bolt.Tx) error {
value := tx.Bucket([]byte("widgets")).Get([]byte("foo"))
fmt.Printf("The value for 'foo' in the clone is: %s\n", value)
return nil
})
// Output:
// The value for 'foo' in the clone is: bar
}
// Ensure that opening an already open database file will wait until its closed.
func TestOpen_Wait(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("timeout not supported on windows")
}
if runtime.GOOS == "solaris" {
t.Skip("solaris fcntl locks don't support intra-process locking")
}
path := tempfile()
defer os.Remove(path)
// Open a data file.
db0, err := bolt.Open(path, 0666, nil)
assert(t, db0 != nil, "")
ok(t, err)
// Close it in just a bit.
time.AfterFunc(100*time.Millisecond, func() { db0.Close() })
// Attempt to open the database again.
start := time.Now()
db1, err := bolt.Open(path, 0666, &bolt.Options{Timeout: 200 * time.Millisecond})
assert(t, db1 != nil, "")
ok(t, err)
assert(t, time.Since(start) > 100*time.Millisecond, "")
}
// Ensure that a re-opened database is consistent.
func TestOpen_Check(t *testing.T) {
path := tempfile()
defer os.Remove(path)
db, err := bolt.Open(path, 0666, nil)
ok(t, err)
ok(t, db.View(func(tx *bolt.Tx) error { return <-tx.Check() }))
db.Close()
db, err = bolt.Open(path, 0666, nil)
ok(t, err)
ok(t, db.View(func(tx *bolt.Tx) error { return <-tx.Check() }))
db.Close()
}
// Ensure that a database that is too small returns an error.
func TestDB_Open_FileTooSmall(t *testing.T) {
path := tempfile()
defer os.Remove(path)
db, err := bolt.Open(path, 0666, nil)
ok(t, err)
db.Close()
// corrupt the database
ok(t, os.Truncate(path, int64(os.Getpagesize())))
db, err = bolt.Open(path, 0666, nil)
equals(t, errors.New("file size too small"), err)
}
func (s Store) Open(dbPath string, cfg *config.Config) (driver.IDB, error) {
os.MkdirAll(dbPath, 0755)
name := path.Join(dbPath, "ledis_bolt.db")
db := new(DB)
var err error
db.path = name
db.cfg = cfg
db.db, err = bolt.Open(name, 0600, nil)
if err != nil {
return nil, err
}
var tx *bolt.Tx
tx, err = db.db.Begin(true)
if err != nil {
return nil, err
}
_, err = tx.CreateBucketIfNotExists(bucketName)
if err != nil {
tx.Rollback()
return nil, err
}
if err = tx.Commit(); err != nil {
return nil, err
}
return db, nil
}
func ExampleBucket_ForEach() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Insert data into a bucket.
db.Update(func(tx *bolt.Tx) error {
tx.CreateBucket([]byte("animals"))
b := tx.Bucket([]byte("animals"))
b.Put([]byte("dog"), []byte("fun"))
b.Put([]byte("cat"), []byte("lame"))
b.Put([]byte("liger"), []byte("awesome"))
// Iterate over items in sorted key order.
b.ForEach(func(k, v []byte) error {
fmt.Printf("A %s is %s.\n", k, v)
return nil
})
return nil
})
// Output:
// A cat is lame.
// A dog is fun.
// A liger is awesome.
}
func ExampleDB_View() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Insert data into a bucket.
db.Update(func(tx *bolt.Tx) error {
tx.CreateBucket([]byte("people"))
b := tx.Bucket([]byte("people"))
b.Put([]byte("john"), []byte("doe"))
b.Put([]byte("susy"), []byte("que"))
return nil
})
// Access data from within a read-only transactional block.
db.View(func(tx *bolt.Tx) error {
v := tx.Bucket([]byte("people")).Get([]byte("john"))
fmt.Printf("John's last name is %s.\n", v)
return nil
})
// Output:
// John's last name is doe.
}
func ExampleBucket_Put() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Start a write transaction.
db.Update(func(tx *bolt.Tx) error {
// Create a bucket.
tx.CreateBucket([]byte("widgets"))
// Set the value "bar" for the key "foo".
tx.Bucket([]byte("widgets")).Put([]byte("foo"), []byte("bar"))
return nil
})
// Read value back in a different read-only transaction.
db.View(func(tx *bolt.Tx) error {
value := tx.Bucket([]byte("widgets")).Get([]byte("foo"))
fmt.Printf("The value of 'foo' is: %s\n", value)
return nil
})
// Output:
// The value of 'foo' is: bar
}
func New() *Service {
config.Init("f", "tester", "collect.conf")
var conf TesterConfig
if err := config.Load(&conf); err != nil {
log.Fatal("config.Load failed:", err)
return nil
}
//init mongo
var colls collection
_, err := mgoutil.Open(&colls, &mgoutil.Config{Host: "127.0.0.1", DB: "pandora_test"})
if err != nil {
log.Fatal("open mongo fail:", err)
}
colls.Alert.RemoveAll(M{})
colls.Repo.RemoveAll(M{})
colls.RepoConfig.RemoveAll(M{})
c := NewInfluxClient()
db, err := bolt.Open("RepoConfigDB", 0600, nil)
if err != nil {
log.Fatal("RepoConfigDB open fail", err)
}
//init service
srv := &Service{colls: colls, influxClient: c, done: make(chan bool), db: db}
return srv
}
func ExampleDB_Begin_ReadOnly() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Create a bucket.
db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucket([]byte("widgets"))
return err
})
// Create several keys in a transaction.
tx, _ := db.Begin(true)
b := tx.Bucket([]byte("widgets"))
b.Put([]byte("john"), []byte("blue"))
b.Put([]byte("abby"), []byte("red"))
b.Put([]byte("zephyr"), []byte("purple"))
tx.Commit()
// Iterate over the values in sorted key order.
tx, _ = db.Begin(false)
c := tx.Bucket([]byte("widgets")).Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
fmt.Printf("%s likes %s\n", k, v)
}
tx.Rollback()
// Output:
// abby likes red
// john likes blue
// zephyr likes purple
}
func ExampleTx_Rollback() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Create a bucket.
db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucket([]byte("widgets"))
return err
})
// Set a value for a key.
db.Update(func(tx *bolt.Tx) error {
return tx.Bucket([]byte("widgets")).Put([]byte("foo"), []byte("bar"))
})
// Update the key but rollback the transaction so it never saves.
tx, _ := db.Begin(true)
b := tx.Bucket([]byte("widgets"))
b.Put([]byte("foo"), []byte("baz"))
tx.Rollback()
// Ensure that our original value is still set.
db.View(func(tx *bolt.Tx) error {
value := tx.Bucket([]byte("widgets")).Get([]byte("foo"))
fmt.Printf("The value for 'foo' is still: %s\n", value)
return nil
})
// Output:
// The value for 'foo' is still: bar
}
// NewTestDB returns a new instance of TestDB.
func NewTestDB() *TestDB {
db, err := bolt.Open(tempfile(), 0666, nil)
if err != nil {
panic("cannot open db: " + err.Error())
}
return &TestDB{db}
}
func ExampleDB_Update() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Execute several commands within a write transaction.
err := db.Update(func(tx *bolt.Tx) error {
b, err := tx.CreateBucket([]byte("widgets"))
if err != nil {
return err
}
if err := b.Put([]byte("foo"), []byte("bar")); err != nil {
return err
}
return nil
})
// If our transactional block didn't return an error then our data is saved.
if err == nil {
db.View(func(tx *bolt.Tx) error {
value := tx.Bucket([]byte("widgets")).Get([]byte("foo"))
fmt.Printf("The value of 'foo' is: %s\n", value)
return nil
})
}
// Output:
// The value of 'foo' is: bar
}
func (s *Schedule) Init(c *conf.Conf) error {
var err error
s.Conf = c
s.AlertStatuses = make(map[string]*AlertStatus)
s.Silence = make(map[string]*Silence)
s.Group = make(map[time.Time]expr.AlertKeys)
s.Incidents = make(map[uint64]*Incident)
s.pendingUnknowns = make(map[*conf.Notification][]*State)
s.status = make(States)
s.Search = search.NewSearch()
s.LastCheck = time.Now()
s.ctx = &checkContext{time.Now(), cache.New(0)}
if s.DataAccess == nil {
if c.RedisHost != "" {
s.DataAccess = database.NewDataAccess(c.RedisHost, true)
} else {
bind := "127.0.0.1:9565"
_, err := database.StartLedis(c.LedisDir, bind)
if err != nil {
return err
}
s.DataAccess = database.NewDataAccess(bind, false)
}
}
if c.StateFile != "" {
s.db, err = bolt.Open(c.StateFile, 0600, nil)
if err != nil {
return err
}
}
return nil
}
func (s *Schedule) Init(c *conf.Conf) error {
//initialize all variables and collections so they are ready to use.
//this will be called once at app start, and also every time the rule
//page runs, so be careful not to spawn long running processes that can't
//be avoided.
var err error
s.Conf = c
s.Group = make(map[time.Time]models.AlertKeys)
s.pendingUnknowns = make(map[*conf.Notification][]*models.IncidentState)
s.lastLogTimes = make(map[models.AlertKey]time.Time)
s.LastCheck = time.Now()
s.ctx = &checkContext{time.Now(), cache.New(0)}
if s.DataAccess == nil {
if c.RedisHost != "" {
s.DataAccess = database.NewDataAccess(c.RedisHost, true, c.RedisDb, c.RedisPassword)
} else {
bind := "127.0.0.1:9565"
_, err := database.StartLedis(c.LedisDir, bind)
if err != nil {
return err
}
s.DataAccess = database.NewDataAccess(bind, false, 0, "")
}
}
if s.Search == nil {
s.Search = search.NewSearch(s.DataAccess)
}
if c.StateFile != "" {
s.db, err = bolt.Open(c.StateFile, 0600, nil)
if err != nil {
return err
}
}
return nil
}
// Ensure that the database returns an error if the file handle cannot be open.
func TestDB_Open_FileError(t *testing.T) {
path := tempfile()
defer os.Remove(path)
_, err := bolt.Open(path+"/youre-not-my-real-parent", 0666, nil)
assert(t, err.(*os.PathError) != nil, "")
equals(t, path+"/youre-not-my-real-parent", err.(*os.PathError).Path)
equals(t, "open", err.(*os.PathError).Op)
}
// Ensure that a database can be opened without error.
func TestOpen(t *testing.T) {
path := tempfile()
defer os.Remove(path)
db, err := bolt.Open(path, 0666, nil)
assert(t, db != nil, "")
ok(t, err)
equals(t, db.Path(), path)
ok(t, db.Close())
}
func ExampleDB_Batch() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Start our web server
count := counter{db}
srv := httptest.NewServer(count)
defer srv.Close()
// Decrease the batch size to make things more interesting.
db.MaxBatchSize = 3
// Get every path multiple times concurrently.
const clients = 10
paths := []string{
"/foo",
"/bar",
"/baz",
"/quux",
"/thud",
"/xyzzy",
}
errors := make(chan error, clients)
for i := 0; i < clients; i++ {
go func(id int) {
errors <- client(id, srv.URL, paths)
}(i)
}
// Check all responses to make sure there's no error.
for i := 0; i < clients; i++ {
if err := <-errors; err != nil {
fmt.Printf("client error: %v", err)
return
}
}
// Check the final result
db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("hits"))
c := b.Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
fmt.Printf("hits to %s: %d\n", k, decode(v))
}
return nil
})
// Output:
// hits to /bar: 10
// hits to /baz: 10
// hits to /foo: 10
// hits to /quux: 10
// hits to /thud: 10
// hits to /xyzzy: 10
}
// Ensure that opening an already open database file will timeout.
func TestOpen_Timeout(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("timeout not supported on windows")
}
path := tempfile()
defer os.Remove(path)
// Open a data file.
db0, err := bolt.Open(path, 0666, nil)
assert(t, db0 != nil, "")
ok(t, err)
// Attempt to open the database again.
start := time.Now()
db1, err := bolt.Open(path, 0666, &bolt.Options{Timeout: 100 * time.Millisecond})
assert(t, db1 == nil, "")
equals(t, bolt.ErrTimeout, err)
assert(t, time.Since(start) > 100*time.Millisecond, "")
db0.Close()
}
// Ensure that opening a database beyond the max step size does not increase its size.
// https://github.com/boltdb/bolt/issues/303
func TestOpen_Size_Large(t *testing.T) {
if testing.Short() {
t.Skip("short mode")
}
// Open a data file.
db := NewTestDB()
path := db.Path()
defer db.Close()
// Insert until we get above the minimum 4MB size.
var index uint64
for i := 0; i < 10000; i++ {
ok(t, db.Update(func(tx *bolt.Tx) error {
b, _ := tx.CreateBucketIfNotExists([]byte("data"))
for j := 0; j < 1000; j++ {
ok(t, b.Put(u64tob(index), make([]byte, 50)))
index++
}
return nil
}))
}
// Close database and grab the size.
db.DB.Close()
sz := fileSize(path)
if sz == 0 {
t.Fatalf("unexpected new file size: %d", sz)
} else if sz < (1 << 30) {
t.Fatalf("expected larger initial size: %d", sz)
}
// Reopen database, update, and check size again.
db0, err := bolt.Open(path, 0666, nil)
ok(t, err)
ok(t, db0.Update(func(tx *bolt.Tx) error { return tx.Bucket([]byte("data")).Put([]byte{0}, []byte{0}) }))
ok(t, db0.Close())
newSz := fileSize(path)
if newSz == 0 {
t.Fatalf("unexpected new file size: %d", newSz)
}
// Compare the original size with the new size.
if sz != newSz {
t.Fatalf("unexpected file growth: %d => %d", sz, newSz)
}
}
func (s *Schedule) Init(c *conf.Conf) error {
var err error
s.Conf = c
s.Silence = make(map[string]*Silence)
s.Group = make(map[time.Time]expr.AlertKeys)
s.Metadata = make(map[metadata.Metakey]*Metavalue)
s.Incidents = make(map[uint64]*Incident)
s.status = make(States)
s.Search = search.NewSearch()
if c.StateFile != "" {
s.db, err = bolt.Open(c.StateFile, 0600, nil)
if err != nil {
return err
}
}
return nil
}
// NewEngine returns an instance of an engine based on its format.
// If the path does not exist then the DefaultFormat is used.
func NewEngine(path string, walPath string, options EngineOptions) (Engine, error) {
// Create a new engine
if _, err := os.Stat(path); os.IsNotExist(err) {
return newEngineFuncs[options.EngineVersion](path, walPath, options), nil
}
// Only bolt-based backends are currently supported so open it and check the format.
var format string
if err := func() error {
db, err := bolt.Open(path, 0666, &bolt.Options{Timeout: 1 * time.Second})
if err != nil {
return err
}
defer db.Close()
return db.View(func(tx *bolt.Tx) error {
// Retrieve the meta bucket.
b := tx.Bucket([]byte("meta"))
// If no format is specified then it must be an original b1 database.
if b == nil {
format = "b1"
return nil
}
// Save the format.
format = string(b.Get([]byte("format")))
if format == "v1" {
format = "b1"
}
return nil
})
}(); err != nil {
return nil, err
}
// Lookup engine by format.
fn := newEngineFuncs[format]
if fn == nil {
return nil, fmt.Errorf("invalid engine format: %q", format)
}
return fn(path, walPath, options), nil
}
func TestNewBoltStore(t *testing.T) {
fh, err := ioutil.TempFile("", "bolt")
if err != nil {
t.Fatalf("err: %s", err)
}
os.Remove(fh.Name())
defer os.Remove(fh.Name())
// Successfully creates and returns a store
store, err := NewBoltStore(fh.Name())
if err != nil {
t.Fatalf("err: %s", err)
}
// Ensure the file was created
if store.path != fh.Name() {
t.Fatalf("unexpected file path %q", store.path)
}
if _, err := os.Stat(fh.Name()); err != nil {
t.Fatalf("err: %s", err)
}
// Close the store so we can open again
if err := store.Close(); err != nil {
t.Fatalf("err: %s", err)
}
// Ensure our tables were created
db, err := bolt.Open(fh.Name(), dbFileMode, nil)
if err != nil {
t.Fatalf("err: %s", err)
}
tx, err := db.Begin(true)
if err != nil {
t.Fatalf("err: %s", err)
}
if _, err := tx.CreateBucket([]byte(dbLogs)); err != bolt.ErrBucketExists {
t.Fatalf("bad: %v", err)
}
if _, err := tx.CreateBucket([]byte(dbConf)); err != bolt.ErrBucketExists {
t.Fatalf("bad: %v", err)
}
}
func (s *Schedule) Init(c *conf.Conf) error {
var err error
s.Conf = c
s.Silence = make(map[string]*Silence)
s.Group = make(map[time.Time]expr.AlertKeys)
s.Metadata = make(map[metadata.Metakey]*Metavalue)
s.Incidents = make(map[uint64]*Incident)
s.pendingUnknowns = make(map[*conf.Notification][]*State)
s.status = make(States)
s.Search = search.NewSearch()
s.LastCheck = time.Now()
s.ctx = &checkContext{time.Now(), cache.New(0)}
if c.StateFile != "" {
s.db, err = bolt.Open(c.StateFile, 0600, nil)
if err != nil {
return err
}
}
return nil
}
// NewBoltStore takes a file path and returns a connected Raft backend.
func NewBoltStore(path string) (*BoltStore, error) {
// Try to connect
handle, err := bolt.Open(path, dbFileMode, nil)
if err != nil {
return nil, err
}
// Create the new store
store := &BoltStore{
conn: handle,
path: path,
}
// Set up our buckets
if err := store.initialize(); err != nil {
store.Close()
return nil, err
}
return store, nil
}
func ExampleBucket_Delete() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Start a write transaction.
db.Update(func(tx *bolt.Tx) error {
// Create a bucket.
tx.CreateBucket([]byte("widgets"))
b := tx.Bucket([]byte("widgets"))
// Set the value "bar" for the key "foo".
b.Put([]byte("foo"), []byte("bar"))
// Retrieve the key back from the database and verify it.
value := b.Get([]byte("foo"))
fmt.Printf("The value of 'foo' was: %s\n", value)
return nil
})
// Delete the key in a different write transaction.
db.Update(func(tx *bolt.Tx) error {
return tx.Bucket([]byte("widgets")).Delete([]byte("foo"))
})
// Retrieve the key again.
db.View(func(tx *bolt.Tx) error {
value := tx.Bucket([]byte("widgets")).Get([]byte("foo"))
if value == nil {
fmt.Printf("The value of 'foo' is now: nil\n")
}
return nil
})
// Output:
// The value of 'foo' was: bar
// The value of 'foo' is now: nil
}
func ExampleCursor_reverse() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Start a read-write transaction.
db.Update(func(tx *bolt.Tx) error {
// Create a new bucket.
tx.CreateBucket([]byte("animals"))
// Insert data into a bucket.
b := tx.Bucket([]byte("animals"))
b.Put([]byte("dog"), []byte("fun"))
b.Put([]byte("cat"), []byte("lame"))
b.Put([]byte("liger"), []byte("awesome"))
// Create a cursor for iteration.
c := b.Cursor()
// Iterate over items in reverse sorted key order. This starts
// from the last key/value pair and updates the k/v variables to
// the previous key/value on each iteration.
//
// The loop finishes at the beginning of the cursor when a nil key
// is returned.
for k, v := c.Last(); k != nil; k, v = c.Prev() {
fmt.Printf("A %s is %s.\n", k, v)
}
return nil
})
// Output:
// A liger is awesome.
// A dog is fun.
// A cat is lame.
}
// Ensure that the database can be copied to a file path.
func TestTx_CopyFile(t *testing.T) {
db := NewTestDB()
defer db.Close()
var dest = tempfile()
db.Update(func(tx *bolt.Tx) error {
tx.CreateBucket([]byte("widgets"))
tx.Bucket([]byte("widgets")).Put([]byte("foo"), []byte("bar"))
tx.Bucket([]byte("widgets")).Put([]byte("baz"), []byte("bat"))
return nil
})
ok(t, db.View(func(tx *bolt.Tx) error { return tx.CopyFile(dest, 0600) }))
db2, err := bolt.Open(dest, 0600, nil)
ok(t, err)
defer db2.Close()
db2.View(func(tx *bolt.Tx) error {
equals(t, []byte("bar"), tx.Bucket([]byte("widgets")).Get([]byte("foo")))
equals(t, []byte("bat"), tx.Bucket([]byte("widgets")).Get([]byte("baz")))
return nil
})
}
// Ensure that opening a database does not increase its size.
// https://github.com/boltdb/bolt/issues/291
func TestOpen_Size(t *testing.T) {
// Open a data file.
db := NewTestDB()
path := db.Path()
defer db.Close()
// Insert until we get above the minimum 4MB size.
ok(t, db.Update(func(tx *bolt.Tx) error {
b, _ := tx.CreateBucketIfNotExists([]byte("data"))
for i := 0; i < 10000; i++ {
ok(t, b.Put([]byte(fmt.Sprintf("%04d", i)), make([]byte, 1000)))
}
return nil
}))
// Close database and grab the size.
db.DB.Close()
sz := fileSize(path)
if sz == 0 {
t.Fatalf("unexpected new file size: %d", sz)
}
// Reopen database, update, and check size again.
db0, err := bolt.Open(path, 0666, nil)
ok(t, err)
ok(t, db0.Update(func(tx *bolt.Tx) error { return tx.Bucket([]byte("data")).Put([]byte{0}, []byte{0}) }))
ok(t, db0.Close())
newSz := fileSize(path)
if newSz == 0 {
t.Fatalf("unexpected new file size: %d", newSz)
}
// Compare the original size with the new size.
if sz != newSz {
t.Fatalf("unexpected file growth: %d => %d", sz, newSz)
}
}
// Ensure that a database can be opened in read-only mode by multiple processes
// and that a database can not be opened in read-write mode and in read-only
// mode at the same time.
func TestOpen_ReadOnly(t *testing.T) {
if runtime.GOOS == "solaris" {
t.Skip("solaris fcntl locks don't support intra-process locking")
}
bucket, key, value := []byte(`bucket`), []byte(`key`), []byte(`value`)
path := tempfile()
defer os.Remove(path)
// Open in read-write mode.
db, err := bolt.Open(path, 0666, nil)
ok(t, db.Update(func(tx *bolt.Tx) error {
b, err := tx.CreateBucket(bucket)
if err != nil {
return err
}
return b.Put(key, value)
}))
assert(t, db != nil, "")
assert(t, !db.IsReadOnly(), "")
ok(t, err)
ok(t, db.Close())
// Open in read-only mode.
db0, err := bolt.Open(path, 0666, &bolt.Options{ReadOnly: true})
ok(t, err)
defer db0.Close()
// Opening in read-write mode should return an error.
_, err = bolt.Open(path, 0666, &bolt.Options{Timeout: time.Millisecond * 100})
assert(t, err != nil, "")
// And again (in read-only mode).
db1, err := bolt.Open(path, 0666, &bolt.Options{ReadOnly: true})
ok(t, err)
defer db1.Close()
// Verify both read-only databases are accessible.
for _, db := range []*bolt.DB{db0, db1} {
// Verify is is in read only mode indeed.
assert(t, db.IsReadOnly(), "")
// Read-only databases should not allow updates.
assert(t,
bolt.ErrDatabaseReadOnly == db.Update(func(*bolt.Tx) error {
panic(`should never get here`)
}),
"")
// Read-only databases should not allow beginning writable txns.
_, err = db.Begin(true)
assert(t, bolt.ErrDatabaseReadOnly == err, "")
// Verify the data.
ok(t, db.View(func(tx *bolt.Tx) error {
b := tx.Bucket(bucket)
if b == nil {
return fmt.Errorf("expected bucket `%s`", string(bucket))
}
got := string(b.Get(key))
expected := string(value)
if got != expected {
return fmt.Errorf("expected `%s`, got `%s`", expected, got)
}
return nil
}))
}
}